[JBDS-3115] Include Ionic palette in Central

    If this "new Ionic connector" only includes "jst.angularjs.feature" should the feature be renamed so it doesn't imply it's all about angularjs? See http://snag.gy/eAu5F.jpg
    Also need to fix provider from "Angelo ZERR" to "JBoss by Red Hat" on angularJS connector in jbdevstudio/com.jboss.jbds.central.discovery.earlyaccess/plugin.xml
    And the connectorIDs need to be different ... currently both are set to id="angularjs-eclipse-feature", which is invalid as only one can be shown in Central.